build-number

Set maxweight to 20 for the canonical speller corpus Fitted against the canonical corpus - corpus-smn plus corpus-smn-x-closed, 4,221,192 tokens assembled at build time - which requires giella-core 1.15.2 or later; before that, a plain build silently weighted from the in-tree file and this value would be measured against the wrong corpus. Note smn is the one language whose PUBLIC corpus alone is smaller than the in-tree file, so a build without the closed corpus inverts every comparison here. Swept 5..40 with unit refinement across 16..22. Versus the previous value of 10, on the same canonical corpus: typos.tsv +12 top-1 / +4 top-5, generated unchanged top-1 / +2 top-5. 20 is the centre of an 18..22 plateau, the peak of the even blend, and effectively tied for the peak under attested-weighted blending; it is also best top-5 on all three test sets at once. Separately from the tuning: the canonical corpus itself cost the generated set 53 top-1 hits relative to the old in-tree corpus, and no maxweight value recovers them - a corpus effect, not a weighting effect. Ranking is close to exhausted on both sets (top-5 within a point of its reachability ceiling); the remaining headroom is reachability.